Unofficial Compal F3896LG API Client

Disclaimer: this is an unofficial Python client for the Compal F3896LG cable gateway's local admin API. It is not affiliated with, endorsed by, or in any way connected to Compal, Liberty Global, Ziggo, or VodafoneZiggo. Use it on your own gateway, at your own risk.

Introduction

The Compal F3896LG is the DOCSIS 3.1 cable gateway that Liberty Global / Ziggo ship to customers in the Netherlands (it also appears elsewhere in the Liberty Global footprint). Its web UI is a single-page app that talks to a small REST API under https://<router>/rest/v1.

This library is an asynchronous Python wrapper around that API. It reads system/firmware info, DOCSIS downstream/upstream channels, cable-modem registration state, provisioned service flows (your plan's rate caps), Wi-Fi configuration/state and the connected-hosts table — and can reboot the gateway. Every response is parsed into a documented dataclass, with the raw payload kept on .raw.

Features

• Single-session handling: the F3896LG allows exactly one authenticated session. Call await client.logout() when done — it sends the gateway's logout (DELETE /user/<id>/token/<token>) and frees the single slot immediately, so the web UI and other clients can log straight back in. client.close() logs out for you. A login attempt while another session is active raises CompalSessionBusyError instead of failing confusingly; if a client exits without logging out, the router still releases the slot on its own after ~15 minutes.
• Lockout-aware login: the password endpoint locks out after a handful of contiguous wrong attempts. Before each login the client reads the unauthenticated login status and refuses to try while a lockout is active, so it never makes things worse.
• DOCSIS diagnostics: downstream power/SNR/modulation/error counters per channel, upstream power/modulation, provisioned service-flow rates, T3/T4 timeouts, the cable-modem event log and DOCSIS registration state.
• WAN / provisioning: the public IPv4/IPv6 address, gateway, DNS servers and lease times (get_provisioning), plus firmware software-update status.
• Network features: UPnP, DMZ, IPv4/IPv6 firewall, port-forwarding rules, static DHCP reservations, guest Wi-Fi (SSID only — never the PSK), Smart Wi-Fi/band-steering and telephony (MTA) line status.
• Connected devices: the DHCP/association table with hostname, IP, interface, Wi-Fi band and RSSI — handy for presence detection.
• Typed models: every response becomes a dataclass; the Wi-Fi PSK is deliberately kept out of the modelled fields (it stays in .raw) so it isn't surfaced by accident.

Installation

Requires Python 3.11 or newer.

pip install compalf3896lg

Or from a checkout:

pip install -r requirements.txt

Authentication

The gateway uses a password-only login (no username): POST /rest/v1/user/login with {"password": "..."} returns a bearer token that is valid for a single session. The admin certificate is self-signed, so TLS verification is off by default.

One session at a time. Close the router's web UI before using this library, or expect a CompalSessionBusyError. Call await client.logout() (or client.close()) when finished to free the slot right away; otherwise the router releases the session on its own roughly 15 minutes after the last request.

Usage

The client manages its own aiohttp session (pass your own via session= if you prefer) and works as an async context manager.

import asyncio
from compalf3896lg import CompalClient

async def main():
    async with CompalClient("192.168.178.1", "your-admin-password") as client:
        await client.login()

        info = await client.get_system_info()
        print(info.model_name, info.software_version)

        state = await client.get_cable_modem_state()
        print(f"DOCSIS {state.docsis_version}: {state.status}, uptime {state.uptime}s")

        for flow in await client.get_service_flows():
            print(flow.direction, flow.max_traffic_rate_mbps, "Mbps")

        for ch in await client.get_downstream_channels():
            print(ch.channel_id, ch.power, "dBmV", ch.snr, "dB", ch.modulation)

        for host in await client.get_hosts():
            print(host.ip_address, host.name, host.interface)

asyncio.run(main())

Checking lockout state without logging in

async with CompalClient("192.168.178.1", "your-admin-password") as client:
    failures, lockout_seconds = await client.get_lockout()
    print(f"{failures} contiguous failures, locked out for {lockout_seconds}s")

Rebooting

async with CompalClient("192.168.178.1", "your-admin-password") as client:
    await client.login()
    await client.reboot()   # drops the WAN for a minute or two — deliberate action

Example

examples/quickstart.py prints a status summary using COMPAL_HOST / COMPAL_PASSWORD from the environment:

COMPAL_HOST=192.168.178.1 COMPAL_PASSWORD='your-admin-password' python examples/quickstart.py

Home Assistant

A companion Home Assistant integration built on this library lives at HA-Compal-F3896LG — install it via HACS to get DOCSIS signal, connected-device and gateway-status sensors, plus a reboot button.

Notes

• TLS: the admin cert is self-signed; verification is off by default. Pass verify_ssl=True if you have installed the cert.
• /network/ipv4/info returns the LAN address/subnet; for the public WAN address use get_provisioning() (/system/gateway/provisioning).
• Errors: the package raises CompalAuthError (wrong password), CompalLockoutError (login locked out), CompalSessionBusyError (another session active), CompalAPIError (bad response, carries status_code/error_code), CompalNetworkError (timeout/connection/TLS) and CompalValidationError (bad arguments) — all subclasses of CompalError.

License

MIT — see LICENSE.